Pointing to a photograph of Hari,Vijay said,"The father of his sister is the husband of my wife's mother". How is Vijay related to Hari?

All the six members of a family $A, B, C, D, E$ and $F$ are travelling together. $B$ is the son of $C$ but $C$ is not the mother of $B$. $A$ and $C$ are a married couple. $E$ is the brother of $C$. $D$ is the daughter of $A$. $F$ is the brother of $B$. Who is the wife of $E$?

$A$ woman walking with a boy meets another woman and on being asked about her relationship with the boy,she says,"My maternal uncle and his maternal uncle's maternal uncle are brothers." How is the boy related to the woman?

$A$ boy goes to see a film and finds a man who is his relative. The man is the husband of the sister of his mother. How is the man related to the boy?

Introducing a man to her husband,a woman said,"His brother's father is the only son of my grandfather." How is the woman related to this man?

Following questions are based on the information provided below:
$A \times B$ means $A$ is mother of $B$.
$A - B$ means $A$ is brother of $B$.
$A + B$ means $A$ is sister of $B$.
$A \div B$ means $A$ is father of $B$.
Which of the following means $R$ is maternal uncle of $T$?